From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001 From: Andreas Baumann Date: Sat, 3 Jan 2015 13:58:15 +0100 Subject: patch to Vanilla Tomato 1.28 --- release/src/router/busybox/libbb/rtc.c | 90 ++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 release/src/router/busybox/libbb/rtc.c (limited to 'release/src/router/busybox/libbb/rtc.c') diff --git a/release/src/router/busybox/libbb/rtc.c b/release/src/router/busybox/libbb/rtc.c new file mode 100644 index 00000000..51834f8f --- /dev/null +++ b/release/src/router/busybox/libbb/rtc.c @@ -0,0 +1,90 @@ +/* + * Common RTC functions + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" +#include "rtc_.h" + +#if ENABLE_FEATURE_HWCLOCK_ADJTIME_FHS +# define ADJTIME_PATH "/var/lib/hwclock/adjtime" +#else +# define ADJTIME_PATH "/etc/adjtime" +#endif + +int FAST_FUNC rtc_adjtime_is_utc(void) +{ + int utc = 0; + FILE *f = fopen_for_read(ADJTIME_PATH); + + if (f) { + RESERVE_CONFIG_BUFFER(buffer, 128); + + while (fgets(buffer, sizeof(buffer), f)) { + int len = strlen(buffer); + + while (len && isspace(buffer[len - 1])) + len--; + + buffer[len] = 0; + + if (strncmp(buffer, "UTC", 3) == 0) { + utc = 1; + break; + } + } + fclose(f); + + RELEASE_CONFIG_BUFFER(buffer); + } + + return utc; +} + +int FAST_FUNC rtc_xopen(const char **default_rtc, int flags) +{ + int rtc; + + if (!*default_rtc) { + *default_rtc = "/dev/rtc"; + rtc = open(*default_rtc, flags); + if (rtc >= 0) + return rtc; + *default_rtc = "/dev/rtc0"; + rtc = open(*default_rtc, flags); + if (rtc >= 0) + return rtc; + *default_rtc = "/dev/misc/rtc"; + } + + return xopen(*default_rtc, flags); +} + +time_t FAST_FUNC rtc_read_time(int fd, int utc) +{ + struct tm tm; + char *oldtz = 0; + time_t t = 0; + + memset(&tm, 0, sizeof(struct tm)); + xioctl(fd, RTC_RD_TIME, &tm); + tm.tm_isdst = -1; /* not known */ + + if (utc) { + oldtz = getenv("TZ"); + putenv((char*)"TZ=UTC0"); + tzset(); + } + + t = mktime(&tm); + + if (utc) { + unsetenv("TZ"); + if (oldtz) + putenv(oldtz - 3); + tzset(); + } + + return t; +} -- cgit v1.2.3-54-g00ecf